unichr(i) -> string
Returns a one-character Unicode string whose Unicode code is the
integer i. For example, unichr(97) returns
the string u'a'. This is the inverse of ord for Unicode strings. The valid
range for the argument depends how Python was configured -- it may
be either UCS2 [0..0xFFFF] or UCS4 [0..0x10FFFF]. ValueError is raised
otherwise. (New in version 2.0.)